/**
 ******************************************************************************
 *
 * @file       waypointcircle.cpp
 * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
 * @brief      A graphicsItem representing a circle connecting 2 waypoints
 * @see        The GNU Public License (GPL) Version 3
 * @defgroup   OPMapWidget
 * @{
 *
 *****************************************************************************/
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include "waypointcircle.h"
#include <math.h>
#include "homeitem.h"

namespace mapcontrol {
WayPointCircle::WayPointCircle(WayPointItem *center, WayPointItem *radius, bool clockwise, MapGraphicItem *map, QColor color, bool dashed, int width) : QGraphicsEllipseItem(map),
    my_center(center), my_radius(radius), my_map(map), myColor(color), myClockWise(clockwise), dashed(dashed), width(width)
{
    connect(center, SIGNAL(localPositionChanged(QPointF, WayPointItem *)), this, SLOT(refreshLocations()));
    connect(radius, SIGNAL(localPositionChanged(QPointF, WayPointItem *)), this, SLOT(refreshLocations()));
    connect(center, SIGNAL(aboutToBeDeleted(WayPointItem *)), this, SLOT(waypointdeleted()));
    connect(radius, SIGNAL(aboutToBeDeleted(WayPointItem *)), this, SLOT(waypointdeleted()));
    refreshLocations();
    connect(map, SIGNAL(childSetOpacity(qreal)), this, SLOT(setOpacitySlot(qreal)));
}

WayPointCircle::WayPointCircle(HomeItem *radius, WayPointItem *center, bool clockwise, MapGraphicItem *map, QColor color, bool dashed, int width) : QGraphicsEllipseItem(map),
    my_center(center), my_radius(radius), my_map(map), myColor(color), myClockWise(clockwise), dashed(dashed), width(width)
{
    connect(radius, SIGNAL(homePositionChanged(internals::PointLatLng, float)), this, SLOT(refreshLocations()));
    connect(center, SIGNAL(localPositionChanged(QPointF)), this, SLOT(refreshLocations()));
    connect(center, SIGNAL(aboutToBeDeleted(WayPointItem *)), this, SLOT(waypointdeleted()));
    refreshLocations();
    connect(map, SIGNAL(childSetOpacity(qreal)), this, SLOT(setOpacitySlot(qreal)));
}

int WayPointCircle::type() const
{
    // Enable the use of qgraphicsitem_cast with this item.
    return Type;
}

void WayPointCircle::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    Q_UNUSED(option);
    Q_UNUSED(widget);

    QPointF p1;
    QPointF p2;
    p1 = QPointF(line.p1().x(), line.p1().y() + line.length());
    p2 = QPointF(line.p1().x(), line.p1().y() - line.length());
    QPen myPen = pen();
    myPen.setColor(myColor);
    if (width > 0) {
        myPen.setWidth(width);
    }
    if (dashed) {
        QVector<qreal> dashes;
        dashes << 4 << 8;
        myPen.setDashPattern(dashes);
    }
    qreal arrowSize = 10;
    painter->setPen(myPen);
    QBrush brush    = painter->brush();
    painter->setBrush(myColor);
    double angle    = 0;
    if (!myClockWise) {
        angle += M_PI;
    }

    QPointF arrowP1  = p1 + QPointF(sin(angle + M_PI / 3) * arrowSize,
                                    cos(angle + M_PI / 3) * arrowSize);
    QPointF arrowP2  = p1 + QPointF(sin(angle + M_PI - M_PI / 3) * arrowSize,
                                    cos(angle + M_PI - M_PI / 3) * arrowSize);

    QPointF arrowP21 = p2 + QPointF(sin(angle + M_PI + M_PI / 3) * arrowSize,
                                    cos(angle + M_PI + M_PI / 3) * arrowSize);
    QPointF arrowP22 = p2 + QPointF(sin(angle + M_PI + M_PI - M_PI / 3) * arrowSize,
                                    cos(angle + M_PI + M_PI - M_PI / 3) * arrowSize);

    arrowHead.clear();
    arrowHead << p1 << arrowP1 << arrowP2;
    painter->drawPolygon(arrowHead);
    arrowHead.clear();
    arrowHead << p2 << arrowP21 << arrowP22;
    painter->drawPolygon(arrowHead);
    painter->translate(-line.length(), -line.length());
    painter->setBrush(brush);
    painter->drawEllipse(this->rect());
}

void WayPointCircle::refreshLocations()
{
    line = QLineF(my_center->pos(), my_radius->pos());
    this->setRect(my_center->pos().x(), my_center->pos().y(), 2 * line.length(), 2 * line.length());
    this->update();
}

void WayPointCircle::waypointdeleted()
{
    this->deleteLater();
}

void WayPointCircle::setOpacitySlot(qreal opacity)
{
    setOpacity(opacity);
}
}
